Hundred?Seems a little low price to me for such an old cymbal, especially for K. But then, I know little about evaluating old cymbals.Or did you mean it like since nobody will believe how old it is, it's gonna be priced as usual vintage Zildjian of this size and weight?
It probably won't be even considered to be a Zildjian by prospective buters and theefore cannot be expected to bring much more than just that.
And yet, even a recognizable specimen of a 14" Constantinople K. might only be expected fetch about $150-$175, even on a good day.
There's just not that much demand for concert band cymbals perhaps except in re-adapting them for use as hi-hats. And even for this purpose they are generally too heavy for that.